| 摘要 |
The present invention is a laser beam delivery system, a method for smoothly and uniformly ablating tissue, e.g., for reshaping a cornea of an eye, even in the face of real-world conditions such as a moving eye. The method includes defining a plurality of scan lines (22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44) in an ablation zone (135) on the tissue and defining a plurality of laser beam ablation points (46, 49, 48) along each of the scan lines. An ablating laser beam is scanned along a series of non-adjacent scan lines (22, 26, 30, 34, 38, 42) of the plurality of scan lines and tissue is intermittently ablated at non-adjacent ones of the laser beam ablation points (46, 48) on each non-adjacent scan line. In another aspect of the invention, an ablation zone (135) is divided into a plurality of domains (70). An average depth of ablation in each of the domains (70) is determined. Tissue is ablated by controlling a number of ablating laser beam pulses in each domain (70) in proportion to the average depth of ablation in each domain (70). |
